Our investigative look back at the Wisconsin recount finds that—despite repeated warnings by computer experts that connecting voting machines to the internet puts them at risk of hacking—the voting machines in some counties in Wisconsin are using wireless modems. This hardware creates a connection that in all likelihood has internet capability, even as the chair of the Election Assistance Commission swears to Congress that the machines are not connected this way. Plus, an international computer security expert shows how the voting machines can be hacked even when they're not connected to the web.

Filmmaker Lulu Friesdat was on the ground in Wisconsin during the recount. This is her third report in a three-part series taking advantage of the unique opportunity that the recount offers to look behind the scenes at a process that is often obscured from view.

We’ve added a fourth and final part to the series that includes a fascinating breakdown of just how close the race was and gives an overview of the whole report. Be sure and check back for that.

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Lulu Friesdat is an Emmy award-winning journalist whose many news assignments include producing election coverage for MSNBC and editing with the CBS Evening News and Good Morning America. She received a Best Documentary award for directing her first feature-length documentary, Holler Back: [not] Voting in an American Town. Follow her on twitter @LuluFriesdat.